“An HP model 3200B VHF Oscillator and ENI model 5100-L NMR RF Broadband Power Amplifier provide a 300 MHz signal to a half-wave dipole antenna. The voltage variation along the length of the dipole transmitting antenna is made evident by touching one end of a 8-Watt fluorescent lamp. A copper rod of the same length as the transmitting antenna is used to show a similar standing wave in voltage along it. A second receiver antenna with an incandescent bulb wired in the middle shows the polarization and shape of the radiation pattern emitted by the transmitter. Finally, a loop antenna is used to show the polarization of the magnetic component of the electromagnetic wave.”
Antenna
![K8XS – JK Antennas Stack [ Video ]](https://i0.wp.com/www.nerfd.net/wp-content/uploads/2021/07/maxresdefault-265x168-7.jpg?w=635&ssl=1)
K8XS – JK Antennas Stack [ Video ]
K8XS – JK Antennas, JK802 (2el-80M), JK2040 Grande (5el-20M/4el-40M Full-size), JK304 (4el-30M) Stack on a 180Ft LUSO Tower. Read more
Mosley PRO-67-C-3 – HF Antenna
One antenna, 4 Elements on 10, 3 Elements on 12, 3 Elements on 15, 3 Elements on 17, 3 Elements on 20, 1 Element on 30 Meters and 3 Elements on 40 Met… Read more
How High should my Dipole Antenna be?
Dipole Antennas – the Effect of Height Above Ground I frequently hear the question: how high should my dipole be? Or alternatively, will my dipo… Read more
![Ground Plane Antennas [ “ARRL The Doctor is In” podcast ]](https://i0.wp.com/www.nerfd.net/wp-content/uploads/2021/07/a-ground-plane-antenna-for-noaa-weather-stations-265x168-1.jpg?w=635&ssl=1)
Ground Plane Antennas [ “ARRL The Doctor is In” podcast ]
Ground Plane Antennas “Ground Plane Antennas” is the topic of the new (December 20) episode of the “ARRL The Doctor is In” podcast. Listen…and l… Read more
Hexbeam 7 Band “40m”, 20, 17, 15, 12, 10 and 6 meters
Hexbeam Finally and after many prayers and here the new Hexbeam with 40 meter band including 7 Bands! Note: The 40 meter band is not directional like… Read more
Review
Custom Coax Cables for Your Station
Custom Coax Cables “Mark, W8BBQ shows how easy it is to use the DX Engineering Custom Cable Builder. Just four easy steps! The builder lets you… Read more
Using the MFJ-1788 Mag Loop Antenna Horizontally
“I test the MFJ-1788 in a horizontal position on my rooftop. The performance is great on 20m. I used an MFJ Cobweb antenna as the comparison ant… Read more
Equipment
![Amptec HF2015DX Amplifier [ Video ]](https://i0.wp.com/www.nerfd.net/wp-content/uploads/2021/07/13418697_274756909542928_7182125022279320675_n-265x168-1.jpg?w=635&ssl=1)
RFinder P2 Dual Band Android DMR Tablet | FIRST LOOK!
Today we go over the newest Android DMR device from RFinder, the P2 tablet with a 7″ screen. This is a dual band DMR and Analog radio built into… Read more
4O3A – STATION GENIUS
Station Genius can control: 4 Square Antenna Systems Antennas Antenna Switches Band Pass Filters Beam Stacks Beverages Rotators RS-232 Devices Station… Read more
![Yaesu FTdx101D [ VIDEO ]](https://i0.wp.com/www.nerfd.net/wp-content/uploads/2021/07/ftdx-101d_________a-265x168-2.jpg?w=635&ssl=1)
Yaesu FTdx101D [ VIDEO ]
In homage to YAESU Musen Founder, Sako Hasegawa, Yaesu Japan is excited to introduce a new High-Class HF/50/70MHz Transceiver, the all-new FTdx101D (1… Read more
The Siru Innovatios SDR20 multi-touch portable SDR
Siru Innovatios SDR20 multi-touch portable SDR Features: 2-channel transceiver operation Two methodologies for implementation: IQ Mod / Demod and Dire… Read more
News
Is That Cuban Radio Jammers On 40 Meters Ham Radio?
“For almost a week straight there has been an abundance of what looks like intentional radio interference on 40 meters HF ham radio. Is this the… Read more
Cuba Is Jamming Ham Radio Frequencies!
“My good friend Alex, W7HU has uncovered that Cuba is jamming ham radio frequencies to stop communication in and out of Cuba. If you’re un… Read more
MINI600 Antenna Analyzer EU1KY Firmware Version 1.04
“Here we take a look at the Mini600 Antenna Analyzer with EU1KY Firmware Version 1.04” Main Functions : Panoramic scan Measurement Generat… Read more
June 2021 Volunteer Monitor Program Activity Report Released
The June 2021 activity report of the Volunteer Monitor (VM) Program has been released. The VM Program is a joint initiative between the ARRL and FCC t… Read more
AMSAT CubeSatSim First Official Release – v1.0
I am very pleased to announce the first software release of the CubeSatSim software v1.0! Along with the first hardware release v1.0 last month,… Read more
The post Radio Wave Properties: Electric and Magnetic Dipole Antennae appeared first on QRZ NOW – Ham Radio News.